Half to john s



(No Model.)

- P. H. HARVEY.

NUT LOOK.

Patented Nov. 20, 1888.

w W 3 f w m .IINITED STATES PATENT OFF CE.

FRANCIS H. HARVEY, OF BATON ROUGE, LOUISIANA, ASSIGNOR OF ONE- HALE TOJOHN S. PEARCE, OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent N 0. 393.303. datedNovember 20, 1888.

Application filed August 4, 1888. Serial No. 281,925.

To aZZ whom, it may concern:

Be it known that I, FRANCIS H. HARVEY, of Baton Rouge, in the parish ofEast Baton Rouge and State of Louisiana, have invented a new and usefulImprovement in Nut-Locks; and I do hereby declare that the following isa full, clear, and exact description of the same.

My invention is an improved device for looking nuts upon bolts toprevent their loosening, and is designed particularly for use uponrailroads where the nuts securing the fish-plates to the rails arelikely to become loose owing to the jarring caused by passing trains.

Many devices have been heretofore patented for the purpose above noted,but all are more or less objectionable, owing to cost of manufacture andlack of efficiency in operation; but my invention has for its object toprovide a device which can be manufactured very cheaply, and which shallbe very effective in accomplishing the desired result.

My invention therefore consists of the various details of constructionwhereby I am enabled to carry out my invention, all as hereinafter fullydescribed, and specifically claimed.

In the accompanying drawings, Figure 1 is a perspective view of twoadjoining rails with my improved nut-lock in place. Fig. 2 is a planView of the locking device before it is placed in position.

In the drawings, the rails are represented at A A, connected byfish-plates B, and the bolts joining the plates to the rails are shownat a and the nuts for the same at b. Myimproved locking device isrepresented at 0. It is stamped out of sheet metal in the form shown inFig. 2, with extensions on all four sides, the longitudinal portionsbeing marked 0 c and the (No model.)

transverse portions (1 d. The portions 0 c are in width about equal tothat of the fish-plate, and have holes a e at suitable distances apart,through which the bolts a pass. One of the transverse extensions (1 hasits end contracted to form a tongue, asfiand this tongue is adapted topass through a slit, 9, cut on the other transverse extension (2 whenthe parts are folded together, and thus by bending back the tongue uponitself the parts will be securely fastened together. Afterserewing onthe nuts and before folding the parts together, I place upon thesheet-metal locking device ablock of metal or other suitable material,h, just about equal in length to the space between two nuts, and thisblock acts to prevent the nuts from turning, and is itself preventedfrom dropping off by means of the interlocking of the parts (Z d.

It will be obvious that the locking-plate may be of any length, it beingonly necessary that between any two bolt-holes or every other pair ofboltholes the transverse extensions shouldbe made in order to hold theblock it in place to prevent the nuts from turning.

I claim as my invention A device for locking nuts, consisting of theplate 0, fitting over the bolts, a block, h, interposed between thenuts, and the interlocking portions (1 done above and one below on theplate O-for embracing said block and hold ing it in position,substantially as described.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses.

FRANGIS H. HARVEY. Vitnesses:

JOHN S. PEARCE, W. H. GOODALE.

